C++

容器(container)的erase()函数

本文地址: http://blog.csdn.net/caroline_wendy/article/details/23996013

容器(container)的erase()函数, 是删除一个元素, 会移动迭代器的指针, 指向下一个元素;

迭代器(iterator)是一种指针, 赋值是传递的地址, 指向同样的元素;

代码:

/*
 * test.cpp
 *
 *  Created on: 2014.04.18
 *      Author: Spike
 */

/*eclipse cdt, gcc 4.8.1*/

#include <iostream>
#include <vector>

using namespace std;

int main() {
	std::vector<int> vi = {1, 6, 6, 3};
	std::vector<int>::iterator iter1;
	std::vector<int>::iterator iter2;

	//少删除了一个6
	for (iter1 = vi.begin(); iter1 != vi.end(); ++iter1) {
		if (6 == *iter1) {
			iter2 = iter1;
			vi.erase(iter2);
			//--iter1;
		}
	}

	std::cout << "vector size is : " << vi.size() << std::endl;
	for (iter1 = vi.begin(); iter1 != vi.end(); ++iter1) {
		std::cout << *iter1 << " ";
	}
	std::cout << std::endl;

	return 0;
}

输出:

vector size is : 3
1 6 3